LXR linux/arch/openrisc/include/asm/dma-mapping.h

   1/*
   2 * OpenRISC Linux
   3 *
   4 * Linux architectural port borrowing liberally from similar works of
   5 * others.  All original copyrights apply as per the original source
   6 * declaration.
   7 *
   8 * OpenRISC implementation:
   9 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
  10 *
  11 * This program is free software; you can redistribute it and/or modify
  12 * it under the terms of the GNU General Public License as published by
  13 * the Free Software Foundation; either version 2 of the License, or
  14 * (at your option) any later version.
  15 */
  16
  17#ifndef __ASM_OPENRISC_DMA_MAPPING_H
  18#define __ASM_OPENRISC_DMA_MAPPING_H
  19
  20/*
  21 * See Documentation/DMA-API-HOWTO.txt and
  22 * Documentation/DMA-API.txt for documentation.
  23 */
  24
  25#include <linux/dma-debug.h>
  26#include <linux/kmemcheck.h>
  27#include <linux/dma-mapping.h>
  28
  29#define DMA_ERROR_CODE          (~(dma_addr_t)0x0)
  30
  31extern struct dma_map_ops or1k_dma_map_ops;
  32
  33static inline struct dma_map_ops *get_dma_ops(struct device *dev)
  34{
  35        return &or1k_dma_map_ops;
  36}
  37
  38#define HAVE_ARCH_DMA_SUPPORTED 1
  39static inline int dma_supported(struct device *dev, u64 dma_mask)
  40{
  41        /* Support 32 bit DMA mask exclusively */
  42        return dma_mask == DMA_BIT_MASK(32);
  43}
  44
  45#include <asm-generic/dma-mapping-common.h>
  46
  47#endif  /* __ASM_OPENRISC_DMA_MAPPING_H */
  48